Machine for punching leather



UNITED STATES y PATENT OFFICE.

L. H. WOOD, OF MARLBOROUGH, MASSACHUSETTS.

MACHINE FOR PUNCHING LEATHER.

Specification forming part of Letters Patent No. 48,474, dated June 27, 1865.

To all whom it 'may concern:

Be it known that I,L. H. WOOD, of Maribor'- ough, inthe county of Middlesex and Stateof Massachusetts, haveinvented a new and useful Self-Feedin g Punch; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the accompanying drawings, foi-min gapartof this specification, in whic Figure l is afront elevation; Fig. 2, a side elevation, and Fig. 3 a back elevation.

Like parts are indicated by the same letfers in all the figures.

The nature of my invention consists, first, in feeding the work along by means of the punch itself, which has a lateral motion imparted to it for that purpose; second, in holding the work by means of a presser while the punch is moving from it; third, in rendering the punch adjustable, so as to punch holes at any required distance apart; and, fourth, in so arranging` the presser in relation to the punch as to draw the work ott' of the latter iu case it happens to stick upon it.

To enable others skilled in the art to make and use my invention, I will now proceed to describe its construction and operation.

A is a stationary frame consisting of a single piece of cast-iron or other suitable material, the general shape of which is shown in the drawings. This frame is placed upon a bench or table of any required height, and at tached thereto by means of screws.

a c andb b are ears or starts on the front side of the frame A, as shown in Figs. l and 2, .through which are passed the round rods .f/ U' B is the punch-carrier, of cast-iron or other suitable material, sliding freelyon the rods g g, beingforced to the right, or tothe position shown in Fig. l, by means of the two spiral .springs M, and carried to the left, or to the position represented by the colored lines in Fig. 1, by the cam S on the vertical rod Q, said cam striking against the friction -roller T, which turns on a pin projecting from the back side of the punch-carrier through the slot f in the frame A.

C is around shaft, which plays freely through the starts k and Z. This shaft is thrown upvby means of the spiral spring m, the upper end of means of which the lateral motion of the latter may be regulated, so as to punch holes any required distance apart.

J `is the presser-shaft, which plays freely through the starts d d, being forced down by the spiral spring q, the lower end of which rests upon the thimble N.

L is theiiat presser-.foot attached to the bottom of the shaft J.

M is the step or table, between which and the presser L the material to be punched is held while the punch is recedingfrom it. This table Mumay be cast upon the face of the frame A, or attached thereto by means of screws, as shown in Figs. 1 and 2.

G is a vibrating lever, connected with the carrier B `by means of the pivot a. (See Fig.2.)

EI and I are pins or starts projecting from the opposite ends of the lever G.

The thimble F, as shown in Fig. l, is pro vided with an arm, the under side of which strikes upon the top of the pin I. The top of the presser-shaft J is also provided with an arm, K, directly over and at right angles with the pin H. Thus, when the punch-shaft O is depressed it is obvious that the presserL will be raised by means ofthe pinHstrikingagainst the under side of the armKat the proper time, as hereinafter explained.

P is a crooked lever, the shape of which is clearly shown in the drawings', turning freely on the fulcrum-pin s between the ears e e on the top of the frame A, w being a spring, the tendency of' which is to throw the front end of the lever up.

Q is a square or fiat sided rod, which slides freely in a suitable bearing in the lower part of the frame A, as represented in Figs. 2 and 3.

This rod Q, is thrown up by means of the spring t, or its equivalent, and brought down in the act of punching by means of a crank,

lever, or treadle connected with its lower end in any obvious manner.

The operation of the machine is as follows: The material to be punched being placed in the proper position under lthe punch D and presser L, the rod Q is forced downward, which causes the cam R to act upon the lever P, which, in turn, forces the punch down to the bed E and punches the hole. The cam R has now reached the straight part of the lower portion of the lever P, over which it may move without communicating` any further motion to the same. The rod Q, is now forced still farther down, when the cam S comes in contact with the frictionroller T, which moves the punch-carrier toward the presser L, which in the meantime is raised by the action of the lever Gr, so that the material to be punched is 'carried along by the punch and under said presser the distancerequired between the holes Iand until the top of the punch-shaft C has passed from under the end of the lever P, when the spring m instantly throws the punch upward and allows the presser L tovbe forced downward by the spring q. The presser now contines the material to be punched, and as the rod Q ascends and the cam S gets above the friction-roller T the springs i i will push the punch-carrier B, with its appendages,-baclr into the position shown in Fig. l, (from the red lines to the black.) Thus the Work will be fed along by the punch itself, and the punched holes will be made at equal distances apart, and by simply turning the set-screw h the distance between the holes can be varied at pleasure.

In punching holes in some kinds of workas, forinstance, in enameled leatherthe punch is apt to stick in the holes and lift the material with it; but this is prevented in my machine by the presser L holding down the material till the. punch is withdrawn therefrom.

Having thus described the construction and operation of my invention, whatl claim as new, and desire to secure by Letters Patent, is-

1. Giving a simultaneous lateral motion to the punch-carrier B and bed E, substantially as set forth, and for the purpose described.

2. Holding the work by means of the presser L during the lateral translatory movement of the punch, substantially as described.

3. Rendering the punch adjustable, so as to punch holes any required distance apart,sub Stan'tially as described.

L. H. WOOD.

Witnesses:

N. AMES, H. W. HARTWELL. 

